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Design of 2-D IIR digital filters with symmetry and constant group delays

โœ Scribed by Takao Hinamoto; Mitsuji Muneyasu; Hideki Toda

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
531 KB
Volume
329
Category
Article
ISSN
0016-0032

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โœฆ Synopsis

A computationall_v eficient technique is developed for the design of twodimensional (2-D) recursive digital jilters that meet simultaneously magnitude and phase specifications. A quadrantal symmetry which exists in the 2-D frequency response is incorporated into the 2-D jilter design. The denominator and the numerator of a 2-D transfer function are designed individually : the former is used to approximate the constant group delays and then the latter is used to approximate the overall magnitude response. The jilter design is analytically ,feasible by solving linear equations only. These serve to reduce the amount ?f calculations drastically. The stability qf the resulting jilters is alcvays guaranteed. Finally two examples are given to illustrate the utility of the proposed technique.

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## Abstract In the design of IIR digital filters, the method that utilizes the classic analog filter design theory to design analog filters and then obtain the corresponding digital filters by __s__โ€“__z__ transformation is wellโ€known. However, IIR digital filters obtained via the bilinear __s__โ€“__z